INFINITY NATURAL RESOURCES, INC.

This summary highlights information contained elsewhere in this Proxy Statement. This summary does not contain all the information you should consider before voting. Please read the entire Proxy Statement before voting. For more complete information regarding our 2025 operational and financial performance and definitions of industry terms, please review our Annual Report, which was filed with the Securities and Exchange Commission (“SEC”) on March 10, 2026.

About Infinity

Infinity Natural Resources, Inc. (“Infinity” or the “Company”) is a growth oriented independent energy company focused on the acquisition, development, and production of hydrocarbons in the Appalachian Basin. We are focused on creating stockholder value through the identification and disciplined development of low-risk, highly economic oil and natural gas assets while maintaining a strong and flexible balance sheet. Our operations are focused on the Utica Shale in eastern Ohio as well as our dry gas assets in both the Marcellus and Utica Shales in southwestern Pennsylvania, providing highly economic stacked development inventory that leverages shared infrastructure and operational efficiencies. Our portfolio is balanced across oil and natural gas assets, allowing us to optimize our development plan to respond to changes in commodity prices over time.

Our corporate headquarters are in Morgantown, West Virginia, and shares of our Class A common stock trade on the New York Stock Exchange (the “NYSE”) under the ticker symbol “INR”.

ANNUAL MEETING AND VOTING DETAILS

Annual Meeting Details

Date & Time: June 9, 2026, 9:30 a.m. Eastern Time

Location: www.virtualshareholdermeeting.com/INR2026

Record Date: April 13, 2026

Board Recommendations on Voting Matters

Voting Your Shares

Even if you plan to virtually attend the Annual Meeting, we strongly encourage you to vote as soon as possible by using one of the methods described below. In all cases, you will need to have your Control Number in hand, which is included on the Notice Regarding the Internet Availability of Proxy Materials (the “Notice”) or Proxy Card you receive in the mail. The deadline to vote is 11:59 p.m. Eastern Time on June 8, 2026 (the day before the Annual Meeting), except for voting that occurs live during the Annual Meeting. If mailed, your completed and signed Proxy Card must be received by June 8, 2026.

By Internet: www.proxyvote.com

By Telephone: 1-800-690-6903

By Mail: Complete, sign, date and return your Proxy Card in the envelope provided

If you are the beneficial owner of shares held in street name (for example, your shares are held in your brokerage account), your method for accessing the proxy materials and voting may vary. Therefore, if you are a beneficial owner, please follow the instructions provided by your broker or nominee to vote by internet, telephone or mail. You should contact your broker or nominee or refer to the instructions provided by your broker or nominee for further information.

You may receive more than one Notice, Proxy Card or other voting instruction form if your shares are held through more than one account (for example, through different brokers or nominees). Each Notice, Proxy Card or other voting instruction form only covers those shares held in the applicable account. If you hold shares in more than one account, you will have to provide voting instructions as to all your accounts to vote all your shares.